BUG=angleproject:1815

Change-Id: Ia200cfe4ce4e6e3edd9ad2de841acbd1df49eb85
Reviewed-on: https://chromium-review.googlesource.com/561636
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>